<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width">
    <title>Document</title>
    <style>
        ul li:first-child {
            background-color: aqua;
        }

        ul li:last-child {
            background-color: palevioletred;
        }

        ul li:nth-child(2) {
            background-color: greenyellow;
        }

        ul li:nth-child(3) {
            background-color: coral;
        }

        ul li:nth-child(4) {
            background-color:azure;
        }

        .box {
            width: 400px;
            height: 50px;
            background-color: bisque;
        }

        .box:hover {
            cursor: pointer;
            /*鼠标变成小手形状，鼠标移入，字体变粉色，边框变橙，背景变青色*/
            color: palevioletred;
            border: 1px solid black;
            background-color: burlywood;
        }
    </style>
</head>

<body>
    <ul>
        <li>1</li>
        <li>2</li>
        <li>3</li>
        <li>4</li>
        <li>5</li>
    </ul>
    <div class="box">
        黄金套链足金十全十美，约2.435克-2.89克。
    </div>
</body>
</html>